Boba Fett is one of the most enduringly popular characters in the Star Wars universe despite his minimal role in the original trilogy. In fact, he was so popular that he got his own origin story in the prequel trilogies.

In the prequels, Star Wars fans learned that Boba was the cloned son of Jango Fett, a legendary Mandalorian bounty hunter who was used by the ‎Kaminoans as their muse for the clone troopers. One of those clones (who obviously looked exactly like Jango) was Captain Rex, a captain in the Grand Army of the Republic and a friend of Obi-Wan Kenobi’s in Star Wars: Revenge of the Sith. Both Jango and Rex (as well as, y’know, the rest of the clones) were portrayed by Temuera Morrison.

And user concrete_isn’t_cement added that Morrison has “proven he can rock the Old Man Rex beard” before in a previous role.

The post points to one of the Rebellion soldiers seen alongside Han Solo on Endor in Star Wars: Return of the Jedi, an older man with a heavy white beard. This man looks pretty similar to how Rex appeared in the Star Wars Rebels animated series; some fans have even speculated that Lucasfilm intentionally made the animated, older Rex look like a random Rebellion soldier as a sort of Easter Egg.